ok guys, speaking to poli84, a supplier and looking around. Here is the list for the 3 door 8P S3 2008 with bi-xenon (Also checked for 2010 5 door S3 8PA) LEDs for all interior, rear plates and DRLs
1) Front Dome module:
- Main Dome Lights: 2 X 6411 Festoon (41mm)
- Map Lights: 2 X BA9S with side firing
2) Rear Dome module (Sportsback have Main Dome Lights at rear also I believe):
- Map lights: 2 X BA9S with side firing
3) Sunvisor (vanity): 2 X 6418 Festoon 37mm (can be 36mm also)
4) Glovebox: 1 X 194 T10 wedge
5) Boot (trunk): 1 X 194 T10 wedge (People having issue with this one without a resistor)
6) Puddle (doors): 2 X 194 T10 wedge
7) Footwell: 2 X 194 T10 wedge
8) Plate No: 2 X 6418 Festoon 37mm (or 36mm)
9) DRL: 2 X P21W (Can someone tell me what the Sportsback will have? PS19W?)
Hope this helps. If anyone knows the rest (Lo Beam/Hi beam (non xenon), xenons, front indicators, side indicators, front foglights, parkers, rear mains, rear brakes, reverse, rear indicators, and fog light then I can add). It would be good to have them all in one place (for pre and post face lift, 3 and 5 door, Non xenon, Xenon).